US4105016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart pump
Assignee: Individual
•
Filing: 1976-11-18
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Granted: 1978-08-08
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Expires: 1996-11-18
Abstract
Abstract A centrifugal blood pump and method of pumping blood to reduce the pressure in either the right or left ventricle in synchronism with the ventricular contractions of a failing heart. The pump is implanted in a parallel relationship with the ventricle to be assisted and is run at a constant speed. When the pressure in the ventricle reaches a predetermined value, blood will automatically start to flow through the pump thereby reducing the maximum allowable pressure in the ventricle being assisted.
Inventors
- 👤 Francis M. Donovan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/80; A61M60/802; A61M60/827; A61M60/829; A61M60/10; A61M60/122; A61M60/165; A61M60/178; A61M60/20; A61M60/205; A61M60/216; A61M60/226; A61M60/232; A61M60/50; A61M60/508; A61M60/562; A61M60/569; A61M60/855; A61M60/871; A61M60/878; A61M60/126; A61M60/148; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
187 words
A system for reducing the pressure in the left or right ventrical of a heart pump comprising: a centrifugal pump means operated at a constant speed, said pump means having an inlet and an outlet and having a valve means placed in said outlet or inlet, said valve means being of the type commonly used for heart valves; a first cannula having one end attached to the inlet of said pump means, the other end of said cannula being adapted to be inserted into the ventricle to be assisted; a second cannula having one end attached to the outlet of said pump means, the other end of said second cannula being adapted to be attached to a natural artery; a first tube attached to said pump means; a second inner tube placed inside of said first tube, said inner tube supplying cooling air to the motor of said pump means, said cooling air being returned to the atmosphere through said first tube; and a pair of electrical wires placed in between said second inner tube and said first tube, said wires supplying electrical power to said motor.
Claim 2
Independent Claim
187 words
A system for reducing the pressure in the left or right ventrical of a heart pump comprising: a centrifugal pump means operated at a constant speed, said pump means having an inlet and an outlet and having a valve means placed in said outlet or inlet, said valve means being of the type commonly used for heart valves; a first cannula having one end attached to the inlet of said pump means, the other end of said cannula being adapted to be inserted into the ventricle to be assisted; a second cannula having one end attached to the outlet of said pump means, the other end of said second cannula being adapted to be attached to a natural artery; a first tube attached to said pump means; a second inner tube placed inside of said first tube, said inner tube supplying cooling air to the motor of said pump means, said cooling air being returned to the atmosphere through said first tube; and a pair of electrical wires placed in between said second inner tube and said first tube, said wires supplying electrical power to said motor.
Claim 3
Dependent Claim
21 words
The system according to claim 1, wherein said centrifugal pump means has logarithmic spiral vanes having a blade angle of 30°.
Claim 4
Independent Claim
171 words
A system for reducing the pressure in the left or right ventricle of a heart comprising: a centrifugal pump means operated at a constant speed, said pump means having an inlet and an outlet and having a valve means placed in said outlet or inlet, said valve means being of the type commonly used for heart valves; a first cannula having one end attached to the inlet of said pump means, the other end of said cannula being adapted to be inserted in the ventricle to be assisted; a second cannula having one end attached to the outlet of said pump means, the other end of said second cannula being adapted to be attached to a natural artery; means for supplying electrical power to said pump means; a first tube attached to said pump means; and a second inner tube placed inside of said first tube, said inner tube supplying cooling air to the motor of said pump means, said cooling air being returned to the atmosphere through said first tube.
Claim 5
Independent Claim
171 words
A system for reducing the pressure in the left or right ventricle of a heart comprising: a centrifugal pump means operated at a constant speed, said pump means having an inlet and an outlet and having a valve means placed in said outlet or inlet, said valve means being of the type commonly used for heart valves; a first cannula having one end attached to the inlet of said pump means, the other end of said cannula being adapted to be inserted in the ventricle to be assisted; a second cannula having one end attached to the outlet of said pump means, the other end of said second cannula being adapted to be attached to a natural artery; means for supplying electrical power to said pump means; a first tube attached to said pump means; and a second inner tube placed inside of said first tube, said inner tube supplying cooling air to the motor of said pump means, said cooling air being returned to the atmosphere through said first tube.
Claim 6
Dependent Claim
43 words
The system according to claim 3, wherein said means for supplying electrical power to said pump means comprise: a pair of electrical wires placed in between said second inner tube and said first tube, said wires supplying the electrical power to said motor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |